Humidifier



FIG. 1 is a top perspective view of the humidifier;

FIG. 2 is a front elevation view of the humidifier;

FIG. 3 is a rear elevation view of the humidifier;

FIG. 4 is a top plan view of the humidifier;

FIG. 5 is a bottom plan view of the humidifier;

FIG. 6 is a left side elevation view of the humidifier; and,

FIG. 7 is a right side elevation view of the humidifier.

The broken line showing of environmental structure in FIG. 1 is forillustrative purposes only and forms no part of the claimed design.

The ornamental design for a humidifier, as shown and described.